fix(graphql-types): ensure short-description is defined

[luqven]

Description

This PR ensures that spec.short_description is defined before it's accessed. There is the possibility a param does not include that property so we should not assume it is always defined.

This PR also bumps the imgix-url-params dependency version to the newest version.

Before

Buils would break because the short_name prop was not defined when accessed.

After

Build succeeded, as we check that it's defined before accessing.

Checklist

• [x] Read the contributing guidelines.
• [x] Each commit follows the Conventional Commit spec format.
• [x] Update the readme (if applicable).
• [x] Update or add any necessary API documentation (if applicable)
• [x] All existing unit tests are still passing (if applicable).

Links

• Addresses https://github.com/imgix/gatsby/issues/270

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[imgix-git-robot]

:tada: This PR is included in version 2.1.3 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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